Separating disk



Sept. 27, 1932. J MAYHEW 1,879,385

SEPARATING DISK Filed Oct. 22, 1930 Patented Sept. 27, 1932 Unirr.STATES PATENT OFFICE JOSEPH HOWARD MAYHEW, OF MINNEAPOLIS, MINNESOTA,ASSIGNOR TO HART- GARTER COMPANY, OF PEORIA, ILLINOIS, A CORPORATION OFDELAWARE SEPARAT'ING DISK Application filed October 22, 1930. Serial No.490,419.

My present invention relates to pocketed separating disks or plates ofthe. general character disclosed and broadly claimed in Letters Patentof the United States No. 1,364,247,

issued to Clarence W. Carter, asv inventor, of date January 4, 1921, andentitled Grain separator, and in the later Carter Patent No. 1,437,042of November 28,1922, and similar to the disks disclosed in my copendingapplication, Serial No. 266,430 filed March The disks employed in thecommercial machines known to the trade as the Carter- Mayhew diskseparator are provided wlth pocket-s adapted to receive and carry overcertain kinds of grain or materials, such as wheat, and to rejectcertain other kinds of materials, such as oats.

Hitherto it has been the practice to cast 2 integral in gray iron theannular pocketed plates, the hubs and the connecting arms, and suchstructures have been highly efficient but have been heavy and thecastings, because of weight and difiiculties in casting, have been quiteexpensive. Extending the use of these separating disks, grain separatorsen1- ploying these pocketed disks have been found to be highly efiicientand very desirable in connection with threshing machines and otherportable machines, and when so used,

excessive weight is objectionable and it becomes highly important,therefore, to reduce the weight of the disks as much as possible, andobviously also, a reduced cost is desirable.

T have found that the above objects may be accomplished, that is, theweight may be reduced greatly under that of cast iron and the cost alsoreduced, by forming the pocketed annular plates or bodies of the disksof a w readily moldable non-metallic substance that is relatively lightas compared with gray or cast iron. Various kinds of material, meetingthe above specification, may be used, but

in practice, I have obtained the best results by employing a compositionmade up of asphalt, selite, fullers earth, molded into shape with thepockets therein while in plastic condition and made hard by pressure, orother- 59 wise. Materials such as bakelite or even unforce the disksfrom the shaft and hence are 6 preferably made from stamped sheet steel.

A commercial form of the improved separating disk is illustrated in theaccompanying drawing wherein like characters indicate like partsthroughout the several views. 05

Referring to the drawing: Fig. 1 is a side or face elevation showing oneof the disks with a pressed metal hub and spoke-forming spider, someportions of the disk being broken away; I

Fig. 2 is an enlarged section taken on the line 22 of Fig. 1, some partsbeing broken away;

Fig. 3 is a fragmentary perspective showing a portion of the disk;

Fig. 4 is a detail in section on the line 44 of Fig. 1; and

Fig. 5 is an enlarged fragmentary section taken on the line 5-5 of Fig.1.

The numeral 6 indicates the annular plateso like body portion of thedisk, the same having pockets 7 in its opposite faces. The pockets 7 areof such size and so formed that they will pick up certain kinds ofmaterial but drop other kinds of material. For the sep- 8 aration ofoats from wheat, said pockets 7 should be of a size and form that theywill reject or quickly drop the oats, but will carry the wheat higher upor further over to a suitable point of discharge under rotation of thedisk in the direction of the arrow marked thereon in Fig. 1.

i This annular disc body 6, as already indicated, is of bakednon-metallic substance which, before baking, is plastic so that thepockets will be pressed or cast therein while in plastic condition andpreferably while the disk is under quite high compression. The disk ispreferably formed integral with oppositely projecting bevelledcam-acting lugs continued operation of the machine employ- 8 that serveto break up accumulations of material between a plurality of disks thatare closely spaced on a. common shaft.

The metallic spider illustrated in the drawing, is made up of twoduplicate or complemental pressed sheet metal members placed in reverserelation or face to face so as to make up the complete spider of lightand hollow but strong construction. These pressed sheet metal membersare stamped or pressed to form hollow hub portions 9, channel-shaped soke-forming portions 1-0 and offset annular rim portions 11. Thehubforming portions 9 are formed with angular shaft passages, the sameas shown being formed hexagonal to fit the hexagonal portion 12 of adisk carrying-shaft 13. To preent the hard thin sheet steel ofhub-forming portions 9 from cutting into the shaft under ing the disks,the walls of said hub-forming portions at their hexagonal shaft-engagingopenings are bent inward at 14; so as to afford wide bearings againstthe shaft. The hubforming portions 9 between the spokes are providedwith segmental flanges 9 the spokes 10 along their edges are formed withflanges 10 and the rim-forming portions 11 between the spokes are formedwith flanges 11 When the two spider sections are secured together toform a complete spider, flanges 9 closely engage, flanges 10 of thespokes closely engage, and flanges 11 of the rim portions 1-1 closelyengage. Therim-forming portions 11 embrace and clamp the inner edge ofthe annular disk 6 and are secured thereto preferably by rivets 15.

The spider described, while strong, will be very light and will havejust enough flexibility to adapt itself to any slight irregularities inthe disk. The complete disk including the hub spider affords a verylight structure especially adapted for use where the elimination ofweight is an important matter such, for example, as in travellingthreshers or portable separators. The hub 0r spider structure, by theuse of pressed metal members may be made strong but light. The pocketeddisk body, however, of necessity must have considerable thickness andwhen made of cast iron or similar metal is necessarily a relativelyheavy structure, but when made from a non-metallic substance such asstated, becomes a comparatively light structure and, moreover, thepockets can be more readily and accurately formed in this non-metalliccomposition material than they can in metal casting. Moreover, thenon-metallic disk costsmuch less than even cast iron disks.

In the operation of a separating machine involving a plurality of thesedisks mounted on a common shaft, the openings between the spokes of thedisk-carrying spider-afford passages through which the grain or materialbe-.

ing separated can be progressively fed from one disk to the other.

What I claim is:

1. A rotatable grain-separating disk adapted to be mounted upon a shaft,said disk comprising a pocketed ring-like relatively light separatingplate of moulded plastic composition, an annular metal member fixed toand reinforcing the inner periphery of said ring-like plate, and ametallic. hub member adapted to be fastened to said shaft and connectedto said reinforcing member, whereby to strengthen and support the bodyfor rotation with said shaft.

2. A rotatable grain-separating disk comprising a pocketed annular plateof non-metallic relatively light material, a hub member for said platecomprising opposed sheet metal members providing a hollow hub portionand an annular channeled rim portion, said rim portion embracing theinner peripheral edge of said plate, and means securing said sheet metalmembers together and to said plate, whereby to strengthen and supportsaid plate for rotation about a horizontal was.

In testimony whereof I afliX my signature.

